Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 98 for “"sampling design"”.
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Improving Survey Methodology Through Matrix Sampling Design, Integrating Statistical Review Into Data Collection, and Synthetic Estimation Evaluation
… of survey methodology, from questionnaire design to final estimation. We first approach the questionnaire development stage by proposing a method of developing matrix sampling designs, a design where a subset of questions are administered to a respondent in such a way that the administered …
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Analyses of Two Aspects of Study Design for Bioassessment With Benthic Macroinvertebrates: Single Versus Multiple Habitat Sampling and Taxonomic Identification Level
… There are strongly divided opinions about study design, sampling methods, laboratory analyses, and data analysis. Two issues that are currently being debated about study design for bioassessment in streams were examined here: 1) what habitats within streams should be sampled; 2) and is it …
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Sinkhole Form as an Indicator of Process in Karst Landscape Evolution
… sinkhole; and then using a random, stratified sampling design, postulates and evaluates the importance of non-solutional processes in the development of sinkholes in two contrasting karst subtypes (normal and exhuming fluviokarst) of the Mitchell Plain, south central Indiana.
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The development and application of statistical sampling regime to map out hydrocarbons in sediments.
… investigates and develops a stratified random sampling design for sediments in an offshore oil field environment. The sampling area was partitioned equally into sixteen zones. Stratification was based on the near-field and far-field areas, and the number of samples in each zone was chosen by …
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An Exploratory Study of Pediatric Oncology Nurses’ Perceptions of and Advocacy Responses to Ethical Issues in Securing Informed Consent in Adolescent and Young Adult Patients
… patients. A descriptive, exploratory research design utilizing an anonymous online survey was used for this study. The sample consisted of registered nurses living in the United States currently employed full or part-time in direct care roles with pediatric oncology patients. A total of 270 …
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Bayesian analysis for categorical survey data
… are addressed. Limited information about the design variables leads us to model the unknown design variables taking into account the sampling scheme. Random effects are incorporated in the model to deal with the effect of sampling design, that produces the Multinomial GLMM and issues such as …
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Geostatistical design and analysis for estimating local variations in malaria disease burden
Geostatistical design and analysis methods are increasingly used in disease mapping, particularly in resource-limited settings where uniformly precise mapping may be unrealistically costly and the priority is often to identify critical areas where interventions can have the most health impact. In …
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Simulation-based approximate solution of large-scale linear least squares problems and applications
… solution methods that use simulation, importance sampling, and low-dimensional calculations. The main components of this methodology are a regression/ regularization approach that can deal with nearly singular problems, and an importance sampling design approach that exploits existing continuity …
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Population size estimation from mark-resighting surveys
… results of a certain type of marking-resighting sampling design. The design is similar to the commonly used multiple capture-recapture design, yet in some cases economically more feasible and easy to use. Sampling is done by first tagging a number of randomly selected animals with visible markers …
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Immunization assessment of two year olds in a select Harris County population
… records were abstracted using a multistage sampling design to systematically review 806 records. Descriptive and inferential statistics were employed to summarize data and to determine the association between race, income, primary language, and immunization rates. The sample consisted of 69% …
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Bayesian model determination for categorical data survey
… survey data needs to take account of the survey design. Failing to consider the survey design in inference may lead to misleading results. The standard analysis of categorical data, developed under the assumption of multinomial sampling, is inadequate as the commonly used sampling schemes clearly …
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Meta-Analytic and Experience Sampling Investigations Into the Structure of Work Behaviors
… 1 did). Study 2 therefore uses an experience sampling design to observe variation in work behavior in situ. Proportions of within-person variance, extent of similarity and coordination in cyclicity, and magnitude of bivariate relationships (both before and after accounting for statistical …
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Application of Randomized Branch Sampling to Conifer Trees: Estimating Crown Biomass
Randomized branch sampling (RBS) is a sampling scheme which can be implemented to estimate many different attributes of an object displaying a branched or forked form. The aboveground structure of trees (stem and branches) lends itself naturally to this type of sampling design. RBS utilizes the …
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Application of Randomized Branch Sampling to Conifer Trees: Estimating Crown Biomass
Randomized branch sampling (RBS) is a sampling scheme which can be implemented to estimate many different attributes of an object displaying a branched or forked form. The aboveground structure of trees (stem and branches) lends itself naturally to this type of sampling design. RBS utilizes the …
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Estimating Carbon Pool and Carbon Release due to Tropical Deforestation Using High-resolution Satellite Data
… dark object subtraction method. Stratified sampling design based on the remote sensing image was applied for assessing the above-ground biomass and carbon content of the study area. Field sampling was done during 2002-2003. Dbh and height of all the trees inside the sample plots were …
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HABITAT CHARACTERISTICS AND DEMOGRAPHY OF CALYPSO BULBOSA AND CYPRIPEDIUM ARIETINUM IN THE GRAND SABLE DUNES, MICHIGAN
… radius plots in a stratified (by island) random sampling design. The total number of <em>C. arietinum</em> in 2009 was 3,596,000 (95% CI= 2,645,000-4,547,000). <em>C. arietinum</em> has several close vegetative associates, including <em>Chimaphila umbellata</em> and the moss <em>Pleurozium …
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Growth, performance and quality attributes of steers supplemented with high oleic soybean oil
… 30 steers were sorted by weight using stratified sampling design into four pens, 2 being control and 2 being treatment. Control steers were fed a diet that included 3% regular soybean oil, while treatment steers were fed a diet with 3% high oleic soybean oil (HO). All animals were fed diets with …
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Distribution, Movement, and Ecology of Etheostoma spilotum (Gilbert), the Kentucky Arrow Darter, in Gilberts Big Creek and Elisha Creek, Red Bird River Basin, Clay and Leslie Counties, Kentucky
… species is poorly understood, so this study was designed to investigate the species’ movement capabilities, population dynamics, and overall ecology in two streams (Gilberts Big and Elisha Creek) in the Red Bird Ranger District, Daniel Boone National Forest, Kentucky. Project objectives included …
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Assemblage characteristics and sampling considerations for aquatic macroinvertebrates inhabiting a lower Mississippi River stone dike
… the effectiveness of implanted substrates in sampling aquatic macroinvertebrate assemblages associated with stone dikes on the Lower Mississippi River and to obtain basic information on assemblage composition, structure, and patterns of distribution over a dike. For study purposes, …
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